Research groups such as the University of Tokyo have developed a new method that can investigate the production area by analyzing the shells of Lajonkairia lajonii, and "if it becomes a new deterrent to disguise the production area".
Analyzing seashells
There is a method to investigate the origin of Lajonkairia lajonii by using trace elements that are characteristic of each country or region as an index, but it may be affected by changes in water temperature and salt content, and it is difficult to accurately identify the origin. It was done.
The research group of Kentaro Tanaka, a specially appointed researcher at the University of Tokyo, found that the ratio of heavy and light elements called isotopes of the element neodymium differs depending on the country or region, and it is almost unaffected by temperature and salt content. I found it to be incorporated into the shell.
Using this, it was possible to distinguish between domestic and Chinese collections using 12 domestic and 4 Chinese clams, as well as domestic eastern and western Japan. That is.
The research group has confirmed that some of the lajonkairia lajonii sold as Kumamoto Prefecture showed the value from China, and it is said that it will be a new method to investigate the production area.
Kentaro Tanaka, a specially appointed researcher at the Atmosphere and Ocean Research Institute of the University of Tokyo, said, "I hope this method will be a deterrent to disguise the production area."